2) Disable OneDrive for Business in the Office 365 tenant
From the User Profiles tab, you can alter or remove personal sites creation permissions for specific users or group of users. This would disable future personal sites (aka. OneDrive for Business) creation ability of those users.

If you want to disable OneDrive for Business for a specific user, you can use the second option.

2) Disable OneDrive for Business in the Office 365 tenant
From the User Profiles tab, you can alter or remove personal sites creation permissions for specific users or group of users. This would disable future personal sites (aka. OneDrive for Business) creation ability of those users.

If you want to disable OneDrive for Business for a specific user, you can use the second option.